why do we observe solar and lunar eclipses

why do we observe solar and lunar eclipses

Asked by: Liza Dennis, Brighton Solar eclipses are not actually rarer than lunar eclipses in fact, they occur in about equal numbers, usually about two of each per year. For example, between 2000BC to 3000AD there will be 11,898 solar eclipses and 12,064 lunar eclipses. However, at any one location on Earth, it is much less common to see a solar eclipse than a lunar one. And the reason for this is entirely due to geometry. A lunar eclipse, when the Moon moves through the shadow of the Earth, is visible from wherever the Moon is above the horizon, which is over half of the Earth. However, when the Moon appears to move in front of the Sun during a solar eclipse, the shadow cast by the Moon is much smaller than Earth. Its only about 480km (300 miles) wide when cast onto the Earths surface.

 why do we need to study greek mythology

why do we need to study greek mythology

Reading and hearing about Greek mythology is one thing but why are modern people still made to study them? The answer to that is very simple: to learn. People still study the ancient Greeks and their myths much in the same reason they study other cultures and that is so they can learn from it. After all, when you study a culture as progressive as that of the ancient Greeks, you really canБt help but learn lessons. These myths, for their part, show modern people a glimpse of how they thought in the past, what they considered important, how their morals worked, etc. Another reason to study those Greek myths is because they have contributed a lot to classic and modern literature in the form of symbols. The ancient Greeks have influenced us in more ways than we can imagine. They have given us

 why is affection important in a relationship

why is affection important in a relationship

Physical affection (e. g. , hugging and kissing) is an important aspect of romantic relationships. Displays of physical affection are associated with relationship satisfaction, and in turn greater relationship satisfaction is associated with greater sexual satisfaction. Therefore, physical affection plays a large role in the emotional and sexual benefits derived from a romantic pairing. In addition, research has shown than a person s satisfaction with the physical affection in their relationship is a strong predictor of love, liking, and overall satisfaction. Despite this connection, the ways in which we can express physical affection vary, and as such, more research is needed. Researchers surveyed 295 college students to examine the link between physical affection and relationship

 why do turtles flip each other over

why do turtles flip each other over

Depending on your point of view, it is one of life s great questions. How does a tortoise that has flipped onto its back, get up again? It s not a rhetorical question, and it goes beyond being a metaphorical or metaphysical query, or a subject for drunken debate. For a tortoise it is a deadly serious matter; being able to right itself counts as one of life s epic struggles, a potential matter of life and death. Now scientists have investigated this struggle in detail, determining if and how tortoises have evolved to do it. Dr Ana GoluboviД at the University of Belgrade, Serbia and colleagues studied the slow-motion thrashings of an inverted chelonian in particular the Hermann's tortoise, to see how the shape of its shell impacts its ability to rise again. Armoured animals can easily lose

 why do tourists visit the amazon rainforest

why do tourists visit the amazon rainforest

Prospective tourists to the Amazon rain forest should keep several important considerations in mind. First, be aware of the weather conditions of the area you're visiting. While rain is expected nearly every day, there will be near-constant rain at certain times of the year in certain regions. Also, it is imperative to know the types of diseases prevalent in the areas you are touring and to take precautions such as preventive medicines and vaccinations. Because of the lack of hotels and airports, it's important to book the tour with a reputable agency and do proactive research on your own. ...

 why was the temple of heaven built

why was the temple of heaven built

The Temple of Heaven is considered the most holy of Beijing s imperial temples. It has been described as a masterpiece of architecture and landscape design. The Temple of Heaven has also been listed as World Cultural Heritage by UNESCO. The Temple of Heaven was built in the (AD 1420) by the emperor Zhu Di in the royal garden. Once a year, at winter solstice, the emperors came here to worship Heaven and to solemnly pray for a good harvest. Since his rule was legitimized by a perceived mandate from Heaven, a bad harvest could be interpreted as his fall from Heaven s favor and threaten the stability of his reign. So, it was not without a measure of self-interest that the emperor fervently prayed for a very good crop. In line with the Confucianist revival during the Ming dynasty, the sacred

 why do they use dye in a ct scan

why do they use dye in a ct scan

Which imaging exams use contrast materials? Barium-sulfate contrast materials that are swallowed or administered by mouth (orally) are used to enhance x-ray and CT images of the (GI) tract, including: the In some situations, iodine-based contrast materials are substituted for barium-sulfate contrast materials for oral administration. Barium-sulfate contrast materials that are administered by enema (rectally) are used to enhance x-ray and CT images of the lower gastrointestinal (GI) tract (colon and rectum). In some situations, iodine-based contrast materials are substituted for barium-sulfate contrast materials for rectal administration. Iodine-based contrast materials injected into a vein (intravenously) are used to enhance x-ray and CT images. Gadolinium injected into a vein

 why do they say frack in battlestar galactica

why do they say frack in battlestar galactica

I understand frak just sort of formed out of their want to say f*** on air (to seem edgy or something? ) without having to bleep it out. That's cool. Kind of inventive. Like reading sith spawn in Star Wars novels. But the thing is, they say it every other sentence. Literally. My roommate has been watching it lately, and i've sat through about three episodes so far, and I'm pretty sure they say it around fifty times an episode, and that's not even an exaggeration. Frak sounds like the kind of thing they should use in a scarcity to the point where it's a fun drinking game. Five times an episode or so. ...

 why worry when you can pray song

why worry when you can pray song

Hi DonnaMarie, I found several versions of the same chorus and then some with verses. They are all different so it would be helpful if we knew the rendition you need. I started transcribing this one but thought I d ask if it was the one you wanted or is it another? Trust Jesus. He is there always Why worry, worry, worry, when you can pray? Why worry, when you can pray? Trust Jesus, He will be your stay. ...

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